Study of low rank Greek coals using FTIR spectroscopy
Study of low rank Greek coals using FTIR spectroscopy
复制标题
DOI：
10.1080/00908310390232442
复制
发表时间：
2003-10-01
期刊：
影响因子：
--
通讯作者：
Kapina, V
中科院分区：
文献类型：
--
作者：
Georgakopoulos, A;Iordanidis, A;Kapina, V
从位于希腊西北部Apofysis-Amynteo褐煤存款的两个钻孔中采集的褐煤和腐殖粘土样品以及通过二氯甲烷索氏提取获得的不溶性有机物的傅里叶变换红外（FTIR）光谱在400和4，800 cm（-1）之间进行了记录。以同样的方式，FTIR光谱用于研究来自Vevi xylite盆地（Apofysis-Amynteo褐煤存款北部）的xylite样品及其焦，其是在3个最终固定温度下热解的固体产物：400 ℃、600 ℃和800 ℃。在Apofysis-Amynteo样品中，在1，800 - 1，000 cm（-1）区域观察到含氧结构，在2，950 - 2，700 cm（-1）区域观察到脂族氢，在900-670 cm（-1）区域观察到芳族面外结构，在3，400 - 3，600 cm（-1）区域观察到羟基。在1，800 - 1，000 cm（-1）区域发现了大量的C=O和C-O-R结构，而在400-600 cm（-1）和3，600 - 3，800 cm（-1）区域发现了粘土和硅酸盐矿物。在初始木糖样品BEX的IR光谱中，主要量的H2O在3,400 cm（-1）的波数处。在木糖样品中在1，032 cm（-1）处的强峰是存在酚和醇C-O键以及与脂肪族或芳香族碳的C-O-C键的证据。800 ℃炭在相同波数下只出现一个弱峰。
Fourier transform infrared (FTIR) spectra of lignite and humic clay samples, collected from 2 boreholes located at Apofysis-Amynteo lignite deposit, NW Greece, as well as their insoluble organic matter, obtained by Soxhlet extraction with dichloromethane, were recorded between 400 and 4,800 cm(-1). In the same way, FTIR spectroscopy was used to study a xylite sample from Vevi xylite basin (north of Apofysis-Amynteo lignite deposit) and its chars, which are the solid products of pyrolysis, at 3 final fixed temperatures: 400degreesC, 600degreesC, and 800degreesC. In the Apofysis-Amynteo samples, oxygen-containing structures were observed in the 1,800-1,000 cm(-1) zone, aliphatic hydrogen in the 2,950-2,700 cm(-1) zone, aromatic out-of-plane structures in the 900-670 cm(-1) zone, and hydroxyl groups in the 3,400-3,600 cm(-1) zone. A great abundance of C=O and C-O-R structures in the 1,800-1,000 cm(-1) region were noticed, while clay and silicate minerals were identified in the 400-600 cm(-1) and 3,600-3,800 cm(-1) zones. In the IR spectra of the initial xylite sample BEX, the major quantity of H2O is at a wave number of 3,400 cm(-1). A strong peak at 1,032 cm(-1) in the xylite sample is evidence of the presence of phenolic and alcoholic C-O bonds as well as C-O-C bonds with aliphatic or aromatic carbons. The 800degreesC char, at the same wave number, presents only a weak peak.